| 摘要 |
A ramp generator suitable for controlling bias or erase heads in magnetic recording includes an integrator (40) which produces a relatively slow ramp signal at values associated with the non-linear region of the recording characteristic and a steeper ramp in the linear region. Additional input resistors (71, 72) are switched in parallel with the input resistor (23) of the amplifier to alter the time constant of integration when particular values of the ramp signal are detected by comparators (77, 78). |
